You know, as much as this drawing is freaking awesome, those guns, they, they just seem a bit off, I know guns well and I actually never seen one like Hannah's holding, even though they are looking good

I think you should starting practicing drawing guns more, try starting with a simple drawing of and then take it to characters' hands. When drawing guns, it's a good idea to have a reference to things like this, here's some simple guns you can use to practice! [link][link][link][link][link]